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Microglial activation in Parkinson’s disease using [18F]-FEPPA

Authors :
Yuko Koshimori
Madeleine Harris
Christine Ghadery
Sarah Coakeley
Antonio P. Strafella
Sylvain Houle
Jinhee Kim
Pablo Rusjan
Source :
Journal of Neuroinflammation. 14
Publication Year :
2017
Publisher :
Springer Science and Business Media LLC, 2017.

Abstract

Neuroinflammatory processes including activated microglia have been reported to play an important role in Parkinson’s disease (PD). Increased expression of translocator protein (TSPO) has been observed after brain injury and inflammation in neurodegenerative diseases. Positron emission tomography (PET) radioligand targeting TSPO allows for the quantification of neuroinflammation in vivo. Based on the genotype of the rs6791 polymorphism in the TSPO gene, we included 25 mixed-affinity binders (MABs) (14 PD patients and 11 age-matched healthy controls (HC)) and 27 high-affinity binders (HABs) (16 PD patients and 11 age-matched HC) to assess regional differences in the second-generation radioligand [18F]-FEPPA between PD patients and HC. FEPPA total distribution volume (V T) values in cortical as well as subcortical brain regions were derived from a two-tissue compartment model with arterial plasma as an input function. Our results revealed a significant main effect of genotype on [18F]-FEPPA V T in every brain region, but no main effect of disease or disease × genotype interaction in any brain region. The overall percentage difference of the mean FEPPA V T between HC-MABs and HC-HABs was 32.6% (SD = 2.09) and for PD-MABs and PD-HABs was 43.1% (SD = 1.21). Future investigations are needed to determine the significance of [18F]-FEPPA as a biomarker of neuroinflammation as well as the importance of the rs6971 polymorphism and its clinical consequence in PD.

Details

ISSN :
17422094
Volume :
14
Database :
OpenAIRE
Journal :
Journal of Neuroinflammation
Accession number :
edsair.doi.dedup.....7c88539fa5dc351ea60c6a21b425454b
Full Text :
https://doi.org/10.1186/s12974-016-0778-1